Don't think bootstrap is relevant in this case - IAC a missing .css wouldn't cause the error.

>I think you may also need to load bootstrap.css and bootstrap.js files.
>
>>I am trying to create an html5, jquery, webapi application and can't even get by the first page, since all of this in brand new to me.
>>
>>I added the nugget package jquery ui and after install tried to use their accordion tool. I have verified via developer tools that to code.jquery.com are returning valid css and script. I coped most of the code from the jquery ui demo page.
>>
>>When run, I get the following error message on the call to: $("#accordion").accordion();
>> Unhandled exception at line 99, column 21 in http://localhost:64779/Home/Index
>> 0x800a01b6 - JavaScript runtime error: Object doesn't support property or method 'accordion'
>>
>>
>>Can anybody see what's wrong? Much appreciated.
>>
>>

>>~html lang="en"~
>>    ~head~
>>        ~meta charset="utf-8"~
>>        ~title~accordion demo~/title~
>>        ~link rel="stylesheet" href="//code.jquery.com/ui/1.11.4/themes/smoothness/jquery-ui.css"~
>>        ~script src="//code.jquery.com/jquery-2.1.3.js"~~/script~
>>        ~script src="//code.jquery.com/ui/1.11.4/jquery-ui.js"~~/script~
>>    ~/head~
>>    ~body~
>>        ~div class="row"~
>>            ~div id="accordion"~
>>                ~h3~Section 1~/h3~
>>                ~div~
>>                    ~p~
>>
>>                        Mauris mauris ante, blandit et, ultrices a, suscipit eget, quam. Integer
>>                        ut neque. Vivamus nisi metus, molestie vel, gravida in, condimentum sit
>>                        amet, nunc. Nam a nibh. Donec suscipit eros. Nam mi. Proin viverra leo ut
>>                        odio. Curabitur malesuada. Vestibulum a velit eu ante scelerisque vulputate.
>>                    ~/p~
>>                ~/div~
>>
>>                ~h3~Section 2~/h3~
>>                ~div~
>>                    ~p~
>>                        Sed non urna. Donec et ante. Phasellus eu ligula. Vestibulum sit amet
>>                        purus. Vivamus hendrerit, dolor at aliquet laoreet, mauris turpis porttitor
>>                        velit, faucibus interdum tellus libero ac justo. Vivamus non quam. In
>>                        suscipit faucibus urna.
>>                    ~/p~
>>                ~/div~
>>                ~h3~Section 3~/h3~
>>                ~div~
>>                    ~p~
>>                        Nam enim risus, molestie et, porta ac, aliquam ac, risus. Quisque lobortis.
>>                        Phasellus pellentesque purus in massa. Aenean in pede. Phasellus ac libero
>>                        ac tellus pellentesque semper. Sed ac felis. Sed commodo, magna quis
>>                        lacinia ornare, quam ante aliquam nisi, eu iaculis leo purus venenatis dui.
>>                    ~/p~
>>                    ~ul~
>>                        ~li~List item one~/li~
>>                        ~li~List item two~/li~
>>                        ~li~List item three~/li~
>>                    ~/ul~
>>                ~/div~
>>                ~h3~Section 4~/h3~
>>                ~div~
>>                    ~p~
>>                        Cras dictum. Pellentesque habitant morbi tristique senectus et netus
>>                        et malesuada fames ac turpis egestas. Vestibulum ante ipsum primis in
>>                        faucibus orci luctus et ultrices posuere cubilia Curae; Aenean lacinia
>>                        mauris vel est.
>>                    ~/p~
>>                    ~p~
>>                        Suspendisse eu nisl. Nullam ut libero. Integer dignissim consequat lectus.
>>                        Class aptent taciti sociosqu ad litora torquent per conubia nostra, per
>>                        inceptos himenaeos.
>>                    ~/p~
>>                ~/div~
>>            ~/div~
>>
>>            ~script~
>>                $(function () {
>>                    $("#accordion").accordion();
>>                });
>>
>>            ~/script~
>>        ~/div~
>>    ~/body~
>>~/html~
>>